Forecast

Take off at the right moment.

Forecast turns weather models into a flight decision: a score for each slot, the wind layer by layer and a simulated trajectory before you hitch the trailer.

WindXplorer Dashboard screen

Flyable or not? See it at a glance.

The dashboard shows the morning and evening FlyScore for each of your places, over four days. Slots are aligned with sunrise and sunset.

  • Your favourite places, by city, GPS or map
  • Temperature, wind direction and speed, gusts, rain
  • The week's trend in one line
  • A score computed with your own wind limits
WindXplorer Dashboard screen

14 days of FlyScore to spot your window.

One line per day: main weather, temperatures, rain, then the morning and evening FlyScore and wind at 120 m. Beyond seven days, the trend is indicative only.

  • Green, orange or red according to your wind limit
  • Wind at 120 m above ground to anticipate drift
  • Image export for your crew
WindXplorer FlyScore screen

The wind, layer by layer, hour by hour.

The windgram crosses time and altitude: balloon heading and wind speed for each level up to 3,000 m, from sunrise to sunset.

  • Surface wind and gusts
  • Thermals, cloud base and 0 °C level
  • Rain, visibility, sunshine
  • Metres or feet, km/h, knots or m/s
WindXplorer Windgram screen

Simulate your trajectory before you take off.

Choose the place, the time and the flight duration. WindXplorer draws three trajectories: near the ground, at cruise altitude and a mixed profile.

  • Trajectories coloured by altitude
  • Topo, satellite or aeronautical chart with airspace
  • Drag the launch point to move it
  • Adjustable climb rate and cruise altitude
WindXplorer Simu screen
FlyScore

FlyScore, a number a pilot can discuss.

Each parameter gets a mark from a grid of thresholds, then the marks are weighted. Some parameters cap the score whatever the rest: seven good parameters do not make up for a CAPE of 1,200 J/kg.

  1. Not flyable0 – 29
  2. Unfavourable30 – 49
  3. Marginal50 – 69
  4. Favourable70 – 84
  5. Excellent85 – 100

From 70 up, the slot holds. Between 50 and 69, a point of caution is identified. Below 50, the trailer stays home.

What weighs in the score

Surface wind and gusts account for 45% between them: most cancellations are decided at inflation and landing, not at altitude. Thermal activity acts as a graded veto and caps the score at 60, 45 or 25 depending on its level.

  • Surface wind28
  • Gusts17
  • Precipitation12
  • Lifted Index10
  • CAPE10
  • Visibility10
  • Temperature / dew point spread8
  • Wind shear5
Hot air balloon with its burner lit, facing the rising sun
The right slot is prepared in advance.

All of Forecast, in detail

  • TimelineThe day hour by hour: surface wind, gusts, weather, thermals, thunderstorm risk, QNH, CAPE, Lifted Index and clouds by level.
  • SoundingThe full vertical profile at flight time: wind and humidity at each level.
  • RadarOne last look at precipitation before you leave.
  • Multi-modelAROME, ICON-D2, ICON-EU, ECMWF, GFS, UKMO, GEM and more: pick the finest model for your area.
  • Airspace and NOTAMsAeronautical zones on the map and NOTAMs for the area to plan your route.
  • AI-assisted decisionA reasoned go / no-go summary built from the slot's data.
  • Places, waypoints and POIsYour launch fields, targets and points of interest, synced on all your devices.
  • ExportsWindgram, timeline and forecasts as images, ready to share with your crew.
Free during the beta, no credit card

Ready for take-off?

Join the pilots who made WindXplorer their copilot.